Building structure



FIG. 1 is a side perspective view of my new building structure design viewed from the left;

FIG. 2 is a side perspective of the building structure design of FIG. 1 viewed from the right;

FIG. 3 is a top side perspective of the building structure of FIG. 1 viewed from the left;

FIG. 4 is a top side perspective of the building structure of FIG. 1 viewed from the right;

FIG. 5 is a front perspective of the building structure of FIG. 1; and

FIG. 6 is a rear perspective of the building structure of FIG. 1. 

The ornamental design for a building structure, substantially as shown and described. 